Tobacco pipe



Dec. 31, 1940.

L. L. MARTIN TOBACCO PIPE Filed Jan 17, 1938 lnu wfol Louis L. Martin Patented Dec. 31, 1940 UNITED STATES PATENT, FI E.

Louis L. Martin, Toronto, Ontario, Canada Application January 17, 1938, Serial No. 185,297

1 Claim.

The principal objects of this invention are to eliminate many of the disagreeable features incident to pipe smoking and to provide a pipe which will effectively cool the smoke before it reaches the mouth of the smoker and which will arrest all particles of tobacco or ash which may be drawn through the smoke passage in the base of the bowl.

A still further object is to provide a pipe which will condense and arrest all moisture which may be drawn into the stem of the pipe, and further, to devise a pipe which may be easily and quickly cleaned of accumulated moisture and foreign matter.

The principal features of the invention consist in the arrangement within a tubular stem, of a core presenting a multiplicity of radially arranged bristles adapted to permit the free passage of smoke through the stem, but capable of interrupting the passage of particles of tobacco or ashand forming means for retaining condensed moisture.

In the accompanying drawing Figure 1 is an elevational view of a pipe constructed in accordance with this invention.

Figure 2 is a longitudinal vertical mid-sectional view.

Figure 3 is an enlarged cross section through the stem.

In the form of pipe herein shown, the bowl I is formed of a solid block of material having a hole 2 leading from the bottom of the bowl orifice 3. The hole 2 is shown threaded to receive a correspondingly threaded portion of the stem or it may have a smooth bore if desired.

The stem 4 is of tubular form, here shown with a reduced end 5, shaped to fit the hole 2 in the bowl, and a reduced end 6 adapted to fit into the counter bore 1 of the bit or mouth piece 8. This 0 stem is preferably formed of a length of thin metal tubing having the ends swaged down to the desired form to fit the bowl and mouth piece. This thin tubing readily absorbs heat from the smoke drawn from the bowl and also readily re- 5 leases the absorbed heat to the surrounding atmosphere, thus forming an excellent radiator for dissipating the heat of combustion of the tobacco.

Within the hollow stem is arranged a core 9,

50 here shown in the form of an elongated brush, the bristles [0 of which, are secured between a pair of spirally twisted wires II. The bristles when thus arranged form a long spiral passage l2 extending from end to end of the core through 55 which the smoke will find free passage.

The smoke will, of course, also pass between the bristles but as these are preferably arranged closely together, they present a very excellent and continuous barrier to the passage of particles of tobacco or ash which may be drawn into the 5 stem.

The smoke passing from the bowl into the stem carries a considerable quantity of moisture from the air drawn into the bowl as well as moisture released from the tobacco and this moisture con- 10 denses upon the multiplicity of bristles arranged in the smoke passage as well as upon the inner wall of the tubular stem.

It will be readily understood that a barrier such as presented by the core described will thorough- 15 ly cleanse the smoke of all foreign materials and when it reaches the mouth of the smoker it will be clean, dry and cool.

The brush core is preferably provided with eX- tension ends I3, either one or both of which pro- 0 J'ect beyond the reduced ends of the tubular stem so that they may be readily grasped by the fingers and the core withdrawn from the stern when it becomes dirty, and such core can be readily 25 cleaned and replaced or a new core may be used if desired. It will be readily understood that in removing this bristle core, the bristles will scrub and clean the inner surface of the tubular stem.

The preferred form of core herein shown as a :0 brush, is very efficient and inexpensive, but it will be readily understood that other forms of cores of a similar nature may be used.

It will be appreciated that the bristles of a core as herein described are quite flexible and that 35 the external diameter thereof is preferably of the same diameter as the interior of the tubular stem, and that it will push into and pull out of the stem quite freely, but when in the stem it will fill the interior thereof with a multiplicity of bristles.

A core of a compressible, resilient porous material which will squeeze through the small entrance to the stem and then expand and form a filter may be used if desired.

Another important feature of a pipe constructed as herein described, is that it provides a pipe which is of extremely light weight. The heavy material of which the bowl is constructed is reduced to the minimum because it has no stem, and the stem and core are of very light weight material and construction.

It is preferable and desirable that the stem be constructed of thin metal tubing with swaged ends, but it will be readily understood that other ternal shoulders, the reduced ends of said tubing beyond the said shoulders and bristled portions of the filter member being adapted for cooperation respectively with a mouthpiece and a smoking unit and said bristled unit normally engaging the inner surface of the metal tubing in extensive contact while at the same time being of sufiicient flexibility to permit its ready removal in either direction past either shoulder through i said reduced tubular end portions by end pres- 310 sure thereon.

' LOUIS L. MARTIN.

ment of the end bristles with the respective ini i 

